Kaltura_Client_Exception thrown

Invalid KS "M2Y1ZjMzYmI4OGNmZDNmYzdmM2Y4YTljNWI3NTRhYTdiNzVmMDBlMHwxMDE7OzE0OTMyMzg1ODE7MjsxNDkzMTUyMTgxLjg1Mzc7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"